Vac Brakes?

[Just a Six??]

I have had Vac brakes since 91 that were done by someone else for me & have always been great! No complaints! But I was playing with the parts & have some questions regarding the pic below. Now the small white checkvalve for booster works great as I tested it today. The other Black one is in line before it abour 1/2 way to TB BUT I noticed its either not a checkvalve? or its broken? I can blow air thru it either way without restriction? So whats it for or why is it there? Is it a checkvalve thats now broken? Thanks!

 

[bmackinnon]

Is it a checkvalve thats now broken? Thanks!

Yes.... FWIW, I too, have had vac brakes for 10+ years (love 'em!), and don't have that 'extra' check valve.... redundant and unnecessary...

 

[Just a Six??]

Yes.... FWIW, I too, have had vac brakes for 10+ years (love 'em!), and don't have that 'extra' check valve.... redundant and unnecessary...

Thats what I was thinking? Why he put it there I have no idea?

I do have a nice little checkvalve that holds great pressure I could add for a backup type deal?
I use one with the PCV. Dont know if its worth it???

 

[bmackinnon]

Thats what I was thinking? Why he put it there I have no idea?

I do have a nice little checkvalve that holds great pressure I could add for a backup type deal?
I use one with the PCV. Dont know if its worth it???

I would say it's worth it if it makes YOU feel better to have it... I see alot of the vac conversions with the xtra CKV like your black one installed.... as long as it is not a flow restriction in the forward direction, it certainly can't hurt anything. The only drawback is the 2 extra connections to possibly blow apart... but you ziptie them anyway.... RIGHT?!? :biggrin: .... especially with your new 6776 combo!!!

 

[Just a Six??]

Ziptie, glue, hairspray etc. They are Not coming apart!
Thanks!! Cheers!

 

[turbojd]

I have that same black valve on my vacuum brakes, it came in my kit that I bought years ago when I did the vacuum brake conversion.

 

[jurassic five 7]

that black canister is a filter.

 

[just plain john]

Anyone know if one is available that is straight instead of 90 degrees?

 

[tmpierced]

Black canister looks like vapor separator - so fluid doesn't enter the vacuum canister.

 

[turbofish38]

Anyone know if one is available that is straight instead of 90 degrees?

It's a vapor filter. Something GM started using back in the 70's to keep gas vapors from eating away at the diaphram inside the booster. Newer cars don't use them anymore.

No. The only one GM ever made has the 90 on the one end.

Here's a couple of pics of what I did to make it look a little better. The bracket that is holding the filter is from a 85-90 vintage Park Ave and I used some 3/8" hose that had one end formed with a 90 degree section on it. I'm using an original TTA vacuum block on top of the TB for a vacuum source.

 

[just plain john]

That's a really clean install Eric.

 

["Turbo-T"]

Ditto

 

[just plain john]

Do you suppose it could be done away with?

 

[TurboMonte 2]

Do you suppose it could be done away with?

YES...

 

[Just a Six??]

So I wonder how dirty that filter is after 16 years? Thanks for clearing it all up guys!

 

[mikestertwo]

Do you suppose it could be done away with?

It can be done away with but I use one anyway.

 

[TurboMonte 2]

Ok Dave--I'm real-late on this one, but looks like TFish set the thread back on track (from total derailment along the ck-valve trail being carved-out...)

You can just clean it, reinstall in same loc & "be free to move about the country"...

(What's your hi temp there for the day??) We had sleet/ snow(3rd time now in past 11 years...) & hi of 35--had to cancel golf match